name="Willow"
#2_3
# print("Hello "+name+"，would you like to learn some Python today!")
print(f"2.3\nHello {name}, would you like to learn some Python today!\n")
#2_4
print(f"2.4\n{name.title()}cup")
print(f"{name.upper()} supper big cup")
print(f"{name.lower()} supper small cup\n") 
#2_5
sentence="我不去想未来是平坦还是泥泞 ，只要热爱生命 ，一切都在意料之中。"
people="wang guozhen"
print(f'2.5\n{people.title()} once said," {sentence}"\n')
#2_6
message=f'2.6\n{people.title()} once said," {sentence}"\n'
print(message)
#2_7
sname="\t'Willow'\t\n" 
print(f"2.7\n{sname.strip()}")
print(sname.rstrip())   
print(sname.lstrip())